oc‧ta‧gon /ˈɒktəɡən $ ˈɑːktəɡɑːn/
noun [countable][
Date: 1500-1600;
Language: Latin;
Origin: octagonum, from Greek, from okta- 'eight' + -gonon '-gon']
a flat shape with eight sides and eight angles
—octagonal /ɒkˈtæɡən
əl $ ɑːk-/
adjective:
an octagonal tower [TahlilGaran] Dictionary of Contemporary English ▲